While she _____ TV, someone _______ at the door.
| A．watch, knocked | B．was watching, knocked |
| C．watching, knocking | D．was watching, is knocking |
— It’s difficult for the village children to cross the river for school.
— I hear a new bridge _______ over the river in a year.
| A．was built | B．is being built | C．has been built | D．will be built |
— I think the man over there must be Bob.
— It _______ be him. He has gone to England.
| A．can’t | B．mustn’t | C．couldn’t | D．shouldn’t |
— What is Grandma cooking in the kitchen?
— Fish, I guess. How nice it _______!
| A．sounds | B．smells | C．tastes | D．looks |
The shop assistant showed her several mobile phones and she chose _______
expensive one.
| A．less | B．least | C．the less | D．the least |
China successfully sent the Shenzhou-8 spacecraft into space _______ November 1, 2011.
| A．in | B．on | C．at | D．by |